Protecting existing trees makes huge financial and social sense. Financially because governments can and will slap heavy fines on developers not seen to be protecting them especially when these trees are in urban areas. And socially as trees add a huge draw factor to new developments and are seen as aesthetically pleasing. Unfortunately, tree roots are incompatible with compression. By installing the Green Grid root bridge we bring you a support layer, a steel that is only 7.5 inches thick. So you can then apply layers of paving/tarmac without compacting the tree root area.